The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 1996
Filed:
Jun. 05, 1995
Tokiharu Ando, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
A memory control apparatus that compresses the time widths of time slots of addresses sequentially outputted from a data processing unit so as to access a memory. Readout data is transferred to the data processing unit while expanding the time slot. In a vacant time formed by compressing the time widths of the time slots of the addresses from the data processing unit, refresh processing or hard disk transfer processing is executed. The time widths of the time slots of addresses sequentially outputted from a CPU are compressed so as to write data in the memory, and parallel to this operation, refresh processing can be executed in a vacant time. The memory control apparatus is suitably used in accesses of waveform data between a tone generator system and a waveform memory. Waveform data supplied from another unit can be written in the waveform memory parallel to tone generation using all tone generation channels of the tone generator system for tone generation.